*{
    padding: 0;
    margin: 0;
}
html,body{
    width: 100%;
    height: 100%;
    background-color: rgba(70,130,180);
    box-sizing: border-box;
}
div{
    box-sizing: border-box;
}
span{
    display: inline-block;
    font-size: 18px;
    color: azure;
    transition: 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55)
}
.totalbox{
    background-color: rgba(42,79,107);
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate3d(-50%,-50%,0);
    padding: 20px 40px;
}
.title{
    text-align: center;
    color: azure;
    padding-bottom: 20px;
}
.infobox{
    position: relative;
    margin-bottom: 20px;
}
.tip{
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    left: 0px;
    font-size: 0;
    
}
.inputbox{
    outline: transparent;
    background-color: transparent;
    border: none;
    padding: 15px 0;
    border-bottom: 2px solid #fff;
    font-size: 18px;
    color: azure;
    width: 100%;
}
.login{
    cursor: pointer;
    background-color: rgba(173,216,230);
    text-align: center;
    font-size: 16px;
    border-radius: 5px;
    padding: 15px;
    margin: 20px 0;
    width: 300px;
}
.text{
    overflow: hidden;
}
.footer{
    display: block;
    margin: 10px 0px;
    font-size: 16px;
}
.footer > a{
    outline: 0;
    text-decoration:none;
    color: rgba(173,216,230);
}
.inputbox:focus + .tip span
{
    color: lightblue;
    transform: translateY(-30px);
}
/* .inputbox:valid + .tip span{
    color: azure;
} */
